REBECQ (BE)
Quarry blast13 March 2020
- Magnitude
- 1.3ML
- Depth
- –
- Belgian time
- 12:18:452020-03-13
- UTC
- 11:18:452020-03-13
Main parameters
| Date and time | 2020-03-13 11:18:45 UTC 2020-03-13 12:18:45 Belgian time |
|---|---|
| Magnitude | ML 1.3 |
| Epicentral coordinates | 50.679° N, 4.136° E Uncertainty ± 1.6 km |
| Event ID | ROB 9670 |
Data source : ROB (Royal Observatory of Belgium)
Last update : 2020-03-31 15:07:41 Belgian time
Location map
- Epicentre
- Station that recorded the event
Arrival times at the stations
Each station first records the P wave, the fastest, then the S wave. The farther a station is from the epicentre, the later the waves reach it and the wider the gap between the two.
- Stations
- 5
- Epicentral distance
- 5.2 – 28.5km
- Mean velocity, P wave
- 5.5km/s
- Mean velocity, S wave
- 3.4km/s
- P wave
- S wave
- Curve fitted to the measurements
Notes and method
Curves: travel time of a direct wave in a homogeneous medium. The velocity of each wave and an origin-time shift, common to both, are fitted to the measurements by least squares. Depth not determined: hypocenter placed at the surface for the calculation. P wave: 5 measurements, root-mean-square deviation 0.26 s. S wave: 4 measurements, root-mean-square deviation 0.32 s.
Station measurements
P- and S-wave arrivals and ground displacement measured at each station. Click a column heading to change the order.
| km | ° | UTC | UTC | s | |
|---|---|---|---|---|---|
| Belgian seismic network (Royal Observatory of Belgium)5 stations | |||||
| SKQSteenkerque | 5.2 | 229 | 11:18:46.71+0.86 s | 11:18:47.42+1.57 s | 0.71 |
| RQRRonquières | 10.3 | 142 | 11:18:48.00+2.15 s | 11:18:49.67+3.82 s | 1.67 |
| UCCBUccle | 20.5 | 50 | 11:18:50.03+4.18 s | 11:18:52.33+6.48 s | 2.30 |
| BRQBracquegnies | 22.1 | 180 | 11:18:50.42+4.57 s | – | – |
| TGATangissart | 28.5 | 107 | 11:18:50.99+5.14 s | 11:18:54.25+8.40 s | 3.26 |